Magneto-ionic control of interfacial magnetism
Name
Beach_Magneto-iconic control.pdf
Size
1.06 MB
Format
Adobe PDF
Checksum (MD5)
b5007ad59bd9896a0759059470eeb811
Author(s)
Bauer, Uwe
Yao, Lide
Tan, Aik Jun
Agrawal, Parnika
Emori, Satoru
Tuller, Harry L.
van Dijken, Sebastiaan
Beach, Geoffrey Stephen
Date Issued
November 2014
Journal
Nature Materials
Publisher
Nature Publishing Group
Citation
Bauer, Uwe, Lide Yao, Aik Jun Tan, Parnika Agrawal, Satoru Emori, Harry L. Tuller, Sebastiaan van Dijken and Geoffrey S. D. Beach. "Magneto-ionic control of interfacial magnetism." Nature Materials: Letter (17 November 20).
Version
Original manuscript
Abstract
In metal/oxide heterostructures, rich chemical electronic magnetic and mechanical properties can emerge from interfacial chemistry and structure. The possibility to dynamically control interface characteristics with an electric field paves the way towards voltage control of these properties in solid-state devices. Here, we show that electrical switching of the interfacial oxidation state allows for voltage control of magnetic properties to an extent never before achieved through conventional magneto-electric coupling mechanisms. We directly observe in situ voltage-driven O{superscript 2−] migration in a Co/metal-oxide bilayer, which we use to toggle the interfacial magnetic anisotropy energy by >0.75 erg cm[superscript −2] at just 2 V. We exploit the thermally activated nature of ion migration to markedly increase the switching efficiency and to demonstrate reversible patterning of magnetic properties through local activation of ionic migration. These results suggest a path towards voltage-programmable materials based on solid-state switching of interface oxygen chemistry.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/nmat4134
